Add support of RTM from TSX extension
- Add RTM code generation support throught 3 X86 intrinsics:
xbegin()/xend() to start/end a transaction region, and xabort() to abort a
tranaction region
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167573 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 4130637..8fd3a27 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -302,6 +302,10 @@
HasBMI2 = true;
ToggleFeature(X86::FeatureBMI2);
}
+ if (IsIntel && ((EBX >> 11) & 0x1)) {
+ HasRTM = true;
+ ToggleFeature(X86::FeatureRTM);
+ }
}
}
}
@@ -330,6 +334,7 @@
, HasLZCNT(false)
, HasBMI(false)
, HasBMI2(false)
+ , HasRTM(false)
, IsBTMemSlow(false)
, IsUAMemFast(false)
, HasVectorUAMem(false)